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1//===-- sanitizer_chained_origin_depot.h ------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// A storage for chained origins.10//===----------------------------------------------------------------------===//11 12#ifndef SANITIZER_CHAINED_ORIGIN_DEPOT_H13#define SANITIZER_CHAINED_ORIGIN_DEPOT_H14 15#include "sanitizer_common.h"16 17namespace __sanitizer {18 19class ChainedOriginDepot {20 public:21 ChainedOriginDepot();22 23 // Gets the statistic of the origin chain storage.24 StackDepotStats GetStats() const;25 26 // Stores a chain with StackDepot ID here_id and previous chain ID prev_id.27 // If successful, returns true and the new chain id new_id.28 // If the same element already exists, returns false and sets new_id to the29 // existing ID.30 bool Put(u32 here_id, u32 prev_id, u32 *new_id);31 32 // Retrieves the stored StackDepot ID for the given origin ID.33 u32 Get(u32 id, u32 *other);34 35 void LockBeforeFork();36 void UnlockAfterFork(bool fork_child);37 void TestOnlyUnmap();38 39 private:40 ChainedOriginDepot(const ChainedOriginDepot &) = delete;41 void operator=(const ChainedOriginDepot &) = delete;42};43 44} // namespace __sanitizer45 46#endif // SANITIZER_CHAINED_ORIGIN_DEPOT_H47